:root {
  --bg: #0c0e14;
  --bg-elevated: #141824;
  --bg-card: #1a1f2e;
  --border: #2a3348;
  --text: #e8ecf4;
  --text-muted: #8b95a8;
  --accent: #6ee7b7;
  --accent-dim: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --radius: 10px;
  --font: 'Outfit', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(110, 231, 183, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(52, 211, 153, 0.05), transparent);
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
}

.header {
  margin-bottom: 1.5rem;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header__icon {
  font-size: 1.75rem;
  color: var(--accent);
}

.header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__subtitle {
  margin: 0.15rem 0 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 960px) {
  .layout {
    grid-template-columns: minmax(320px, 1fr) minmax(340px, 420px);
    align-items: start;
  }

  .panel--results {
    position: sticky;
    top: 1rem;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}

.card h2 {
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.card--prestige .field {
  margin: 0;
  flex: 1;
}

.prestige-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem;
}

.btn {
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: pointer;
  white-space: nowrap;
}

.btn--secondary {
  background: var(--bg-elevated);
  color: var(--text);
}

.btn--secondary:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.btn--ghost:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.card__head h2 {
  margin: 0;
}

.card--sim > .card__head + .sim-highlight {
  margin-top: 0;
}

.upgrade-category {
  margin-bottom: 0.5rem;
}

.upgrade-category summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.upgrade-category summary::-webkit-details-marker {
  display: none;
}

.upgrade-category summary::after {
  content: '▾';
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: transform 0.15s;
}

.upgrade-category[open] summary::after {
  transform: rotate(180deg);
}

.upgrade-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 0.5rem;
}

.upgrade-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 0.75rem;
  align-items: center;
  padding: 0.45rem 0.5rem;
  background: var(--bg-elevated);
  border-radius: 6px;
  border: 1px solid transparent;
}

.upgrade-row:focus-within {
  border-color: var(--accent-dim);
}

.upgrade-row__name-wrap {
  grid-column: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.5rem;
}

.upgrade-row__name {
  font-size: 0.82rem;
  line-height: 1.3;
}

.upgrade-row__hint {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--warn);
  white-space: nowrap;
}

.upgrade-row__hint[hidden] {
  display: none;
}

.upgrade-row__eff {
  display: inline-block;
  min-width: 5.75rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 600;
  line-height: 1.25;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-align: right;
  white-space: nowrap;
}

.upgrade-row__eff--empty {
  visibility: hidden;
  border-color: transparent;
  background: transparent;
}

.upgrade-row__eff--clears {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.upgrade-row__eff--high {
  color: var(--warn);
  border-color: rgba(251, 191, 36, 0.4);
}

.upgrade-row__meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  grid-column: 1;
}

.upgrade-row__controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: nowrap;
  grid-column: 2;
  grid-row: 1 / span 2;
}

.upgrade-row__controls .upgrade-row__eff {
  flex-shrink: 0;
}

.stepper {
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: 0.35rem;
  row-gap: 0.1rem;
}

.stepper__btn {
  font-family: var(--font);
  font-size: 0.55rem;
  line-height: 1;
  width: 1.35rem;
  height: 1.15rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
}

.stepper__btn--up {
  grid-column: 1;
  grid-row: 1;
}

.stepper__btn--down {
  grid-column: 1;
  grid-row: 2;
}

.stepper__btn:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.stepper input[type='number'] {
  grid-column: 2;
  grid-row: 1 / span 2;
  width: 3.25rem;
  text-align: center;
  padding: 0.3rem 0.2rem;
  -moz-appearance: textfield;
  appearance: textfield;
}

.stepper input[type='number']::-webkit-outer-spin-button,
.stepper input[type='number']::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.upgrade-row .max-badge {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.upgrade-row--cap .upgrade-row__name {
  color: var(--accent);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field--inline {
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.field span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

input[type='number'] {
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

input[type='number']:focus {
  outline: none;
  border-color: var(--accent);
}

.upgrade-row input[type='number'] {
  -moz-appearance: textfield;
  appearance: textfield;
}

.upgrade-row input[type='number']::-webkit-outer-spin-button,
.upgrade-row input[type='number']::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1rem;
  margin: 0;
}

.stat-grid--compact {
  grid-template-columns: 1fr;
}

.stat-grid dt {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.stat-grid dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
}

.sim-highlight {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sim-metric {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.75rem;
  background: var(--bg-elevated);
  border-radius: 8px;
}

.sim-metric__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sim-metric__value {
  font-family: var(--mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.sim-metric__hp {
  font-size: 1.15rem;
  color: var(--warn);
}

.sim-metric--warn .sim-metric__value {
  color: var(--warn);
}

.sim-note {
  margin: 0.85rem 0 0;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.dmg-opps {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
}

.opps-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.opps-tab {
  flex: 1;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elevated);
  color: var(--text-muted);
  cursor: pointer;
}

.opps-tab:hover {
  color: var(--text);
  border-color: var(--accent-dim);
}

.opps-tab--active {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--bg);
}

.opps-panel[hidden] {
  display: none;
}

.dmg-opps__title {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.dmg-opps__list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  line-height: 1.65;
  font-family: var(--mono);
}

.dmg-opps__list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid var(--border);
}

.dmg-opps__list li:last-child {
  border-bottom: none;
}

.dmg-opps__hp {
  color: var(--warn);
  text-align: right;
}

.debug-panel {
  margin: 1rem 0 0;
  padding: 0.75rem;
  max-height: 280px;
  overflow: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--text-muted);
  white-space: pre-wrap;
}

.debug-panel code {
  font-family: inherit;
}